Eyeglasses.



N0. 851,542. PATENTED APR. 2S, 1907. E. MEAD. EYEGLASSES.

APPLICATION FILED N0 V,'T,1005.

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CAROLINE E. MEAD, OF LOUISVILLE, KENTUCKY.

EYEGLASSES.

life. 851,542.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed November 7, 1905. Serial No. 286,248.

wZZ whom it may concern:

Be it known that I, CAROLINE E. MEAD, a citizen of the United States of America, residing at Louisville, in the county of J efferson and State of Kentucky, have invented new and useful Improvements in Eyeglasses, of which the following is a specification.

The invention relates .to certain new and useful improvements in eyeglasses, and particularly in the screw for uniting the spring and nose clamps to the lens posts.

The main object of the present invention is the production of means adapted to pre vent accidental unscrewing of the securing springs from the posts, the construction being such that the securing means operates to protect the screw from moisture, whereby the corrosion of the screw is prevented and contact between the head of the screw and the skin of the wearer is guarded against.

The invention in its preferred form will be described in the following specification, ref erence being had particularly to the accompanying drawings, in which:

Figure 1 is a broken front elevation, partly in section, illustrating the application of my invention; Fig. 2 is a section of the same on the line 2-2 of Fig. 1; Fig.3 is an enlarged perspective view of the holding screw constructed in accordance with my invention; and Fig. 4 is a similar view illustrating a modification.

Referring particularly to the drawings, wherein is shown an ordinary type of eyeglass, 1 represents the lens, and 2 the lens post, provided with the usual bridge 3 and spaced arms 4 to receive and hold the lens. 'lhe inner end of the post is formed with the usual side flanges 5 forming a socket to receive the spring nose bow 6 and guard 7, the terminals of said guard and bow being secured Within the socket and to the post through the medium of the securing screw 8.

With the exception of the screw 8, the parts hereinbefore described are of the usual construction, though it is to be understood that any preferred form of structure may be used, as the specific details thereof form no material part of the present invention.

The securing screw 8 is of the ordinary screw form in the usual type of eyeglass, and has been found objectionable in use through its liability to become loosened and permit accidental disengagement of the parts, and

from the fact that the necessary projecting head is liable to bruise the skin of the wearer.

It is the purpose of the present invention to entirely obviate these dilliculties and so construct the screw proper as to absolutely lock the same against accidental displacement, and to providea comparatively broad bearing surface to guard against injurious contact with the skin of the wearer. To this end the screw 8 is formed with a plain head 9, square or rectangular in shape, and of a size to cover the socket piece of the post. From the diagonal corners of the head project arms 10, preferably but two in number and of such transverse sectional dimension as to provide desired flexibility. By preference the head 9 and arms 10 are formed integral and the screw stem 8 fixedly secured centrally of the head, though it is obvious that the completed article may be formed of a single piece of material.

In use the screw 8 is inserted in the usual manner until the head 9 contacts with the free edges of the socket wall of the post, after which the arms 10 are bent to encircle, or partially encircle, said socket piece, said arms, in practice, being of a length to extend from the head 9 down the wall of the socket and around the base of the same adjacent the post proper, as clearly shown in the drawing. As the arms 10 roject from diagonal corners of the head, a ioldiug means is provided in opposite directions and on opposite sides of the post, thereby effectually preventing the accidental displacement of the screw, and through the comparativelybroadplain head, guarding against injurious contact with the skin of the wearer.

In Fig. 4 is illustrated a modified form of screw in which a screw 11, of ordinary form has secured to its head an elongated flexible strip 12. The use of this modified form is obvious from the above description.

From the above description it will be noted that I have provided a securing screw to which is fixed, or with which is formed intogral, a locking means to prevent accidental displacement of the screw in use, and it is this form of screw that I consider the material feature of the present invention.

\Vhile I have shown and described the screw as primarily designed for eye glasses, it is obvious that it is equally serviceable in connection with machinery, automobile and bicycle construction, being constructed of positely extendingdiagonally arranged arms the size and shape desired in the particular projecting therefrom, said arms being of a use. I length to wholly encircle the. head of the post. Having thus described the invention, what In testimony whereof, I afliX my signature 5 is claimed as new, is in presence of two Witnesses.

T 1e combination with a lens 0st for e eglasses arranged to receive and support t lie CAROLINE MEAD nose bow and nose guard, of a screw to secure lVitnesses: said parts to the post, the head of the screw WM. A. NEWHALL, Jr.,

Io comprising a rectangular plate having op NJR.KINsER 

